New dell s2716dg monitor

[Griff7520]

Hi all.during boot I can see a green and a blue pixel about 2 inches from the top of the screen in about centre position.
Once into windows they have gone. Any one know if this is a problem or has anyone else seen this before....is it anything to worry about.
I have had the monitor 3 days and don't know if I should return it while I still can....thanks

 

[Griff7520]

thanks......ran the test and saw no dead pixels or any other kind of pixel tbh. Seems to only be visible during boot. I have not see anything while playing games or anything.